RIDGEFIELD -- Police arrested three people and seized significant amounts of cocaine, heroin and prescription pills when they broke up a suspected drug transaction in a Danbury Road parking lot Tuesday evening.

Detectives put the lot under surveillance after police observed the three behaving in a suspicious manner about 8:45 p.m., according to Capt. Jeff Kreitz.

Upon further investigation the three were taken into custody, and police seized 69 packets of heroin, approximately 45 grams of cocaine, prescription drugs and a knife.

Police charged Christopher Ruggiero, 30, of Waterbury, with possession of narcotics with intent to sell, possession of a controlled substance and weapons in a motor vehicle.